private FontGlyph GetGlyph(Font font, int codepoint, int isize, int iblur, bool isBitmapRequired)
{
var g = 0;
var advance = 0;
var lsb = 0;
var x0 = 0;
var y0 = 0;
var x1 = 0;
var y1 = 0;
var gw = 0;
var gh = 0;
var gx = 0;
var gy = 0;
float scale = 0;
FontGlyph glyph = null;
var size = isize / 10.0f;
if (isize < 2)
{
return(null);
}
if (iblur > 20)
{
iblur = 20;
}
if (font.TryGetGlyph(codepoint, isize, iblur, out glyph))
{
if (!isBitmapRequired || glyph.X0 >= 0 && glyph.Y0 >= 0)
{
return(glyph);
}
}
g = font._font.fons__tt_getGlyphIndex(codepoint);
if (g == 0)
{
throw new Exception(string.Format("Could not find glyph for codepoint {0}", codepoint));
}
scale = font._font.fons__tt_getPixelHeightScale(size);
font._font.fons__tt_buildGlyphBitmap(g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
var pad = FontGlyph.PadFromBlur(iblur);
gw = x1 - x0 + pad * 2;
gh = y1 - y0 + pad * 2;
var currentAtlas = CurrentAtlas;
if (isBitmapRequired)
{
if (!currentAtlas.AddRect(gw, gh, ref gx, ref gy))
{
var ev = CurrentAtlasFull;
if (ev != null)
{
ev(this, EventArgs.Empty);
}
// This code will force creation of new atlas
_currentAtlas = null;
currentAtlas = CurrentAtlas;
// Try to add again
if (!currentAtlas.AddRect(gw, gh, ref gx, ref gy))
{
throw new Exception(string.Format("Could not add rect to the newly created atlas. gw={0}, gh={1}", gw, gh));
}
}
}
else
{
gx = -1;
gy = -1;
}
if (glyph == null)
{
glyph = new FontGlyph
{
Codepoint = codepoint,
Size = isize,
Blur = iblur
};
font.SetGlyph(codepoint, isize, iblur, glyph);
}
glyph.Index = g;
glyph.AtlasIndex = currentAtlas.Index;
glyph.X0 = gx;
glyph.Y0 = gy;
glyph.X1 = glyph.X0 + gw;
glyph.Y1 = glyph.Y0 + gh;
glyph.XAdvance = (int)(scale * advance * 10.0f);
glyph.XOffset = x0 - pad;
glyph.YOffset = y0 - pad;
if (!isBitmapRequired)
{
return(glyph);
}
currentAtlas.RenderGlyph(font, glyph, gw, gh, scale);
return(glyph);
}
private FontGlyph GetGlyph(Font font, int codepoint, int isize, int iblur, bool isBitmapRequired, bool searchRecursively = true)
{
var i = 0;
var g = 0;
var advance = 0;
var lsb = 0;
var x0 = 0;
var y0 = 0;
var x1 = 0;
var y1 = 0;
var gw = 0;
var gh = 0;
var gx = 0;
var gy = 0;
var x = 0;
var y = 0;
float scale = 0;
FontGlyph glyph = null;
int h = 0;
var size = isize / 10.0f;
var pad = 0;
var renderFont = font;
if (isize < 2)
{
return(null);
}
if (iblur > 20)
{
iblur = 20;
}
pad = iblur + 2;
if (font.TryGetGlyph(codepoint, isize, iblur, out glyph))
{
if (!isBitmapRequired || glyph.X0 >= 0 && glyph.Y0 >= 0)
{
return(glyph);
}
}
g = font._font.fons__tt_getGlyphIndex(codepoint);
// Look for the glyph in other loaded fonts
if (g == 0)
{
if (searchRecursively)
{
foreach (var f in _fonts)
{
if (f == font)
{
continue;
}
var newGlyph = GetGlyph(f, codepoint, isize, iblur, true, false);
g = f._font.fons__tt_getGlyphIndex(codepoint);
if (g == 0)
{
continue;
}
return(newGlyph);
}
// No glyph was found at this point
}
}
scale = renderFont._font.fons__tt_getPixelHeightScale(size);
renderFont._font.fons__tt_buildGlyphBitmap(g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
gw = x1 - x0 + pad * 2;
gh = y1 - y0 + pad * 2;
if (isBitmapRequired)
{
if (!_atlas.AddRect(gw, gh, ref gx, ref gy))
{
var a = AtlasFull;
if (a != null)
{
a();
}
// Try again
if (!_atlas.AddRect(gw, gh, ref gx, ref gy))
{
throw new Exception("FONS_ATLAS_FULL");
}
}
}
else
{
gx = -1;
gy = -1;
}
if (glyph == null)
{
glyph = new FontGlyph
{
Codepoint = codepoint,
Size = isize,
Blur = iblur
};
font.SetGlyph(codepoint, isize, iblur, glyph);
}
glyph.Index = g;
glyph.X0 = gx;
glyph.Y0 = gy;
glyph.X1 = glyph.X0 + gw;
glyph.Y1 = glyph.Y0 + gh;
glyph.XAdvance = (int)(scale * advance * 10.0f);
glyph.XOffset = x0 - pad;
glyph.YOffset = y0 - pad;
if (!isBitmapRequired)
return(glyph);
fixed(byte *dst = &_texData[glyph.X0 + pad + (glyph.Y0 + pad) * _params_.Width])
{
renderFont._font.fons__tt_renderGlyphBitmap(dst, gw - pad * 2, gh - pad * 2, _params_.Width, scale,
scale, g);
}
fixed(byte *dst = &_texData[glyph.X0 + glyph.Y0 *_params_.Width])
{
for (y = 0; y < gh; y++)
{
dst[y * _params_.Width] = 0;
dst[gw - 1 + y * _params_.Width] = 0;
}
for (x = 0; x < gw; x++)
{
dst[x] = 0;
dst[x + (gh - 1) * _params_.Width] = 0;
}
}
if (iblur > 0)
{
fixed(byte *bdst = &_texData[glyph.X0 + glyph.Y0 *_params_.Width])
{
Blur(bdst, gw, gh, _params_.Width, iblur);
}
}
_dirtyRect[0] = Math.Min(_dirtyRect[0], glyph.X0);
_dirtyRect[1] = Math.Min(_dirtyRect[1], glyph.Y0);
_dirtyRect[2] = Math.Max(_dirtyRect[2], glyph.X1);
_dirtyRect[3] = Math.Max(_dirtyRect[3], glyph.Y1);
return(glyph);
}